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| author |   Peter Collingbourne <pcc@google.com> | 2022-07-26 16:02:41 -0700 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-09-11 20:25:53 -0700 |
| commit | 4d86d4f7227c6f2acfbbbe0623d49865aa71b756 (patch) | |
| tree | e6e27cdb7ef6fc96c596e5ad9e7a11e7cd2af44c | |
| parent | mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes (diff) | |
| download | linux-dev-4d86d4f7227c6f2acfbbbe0623d49865aa71b756.tar.xz linux-dev-4d86d4f7227c6f2acfbbbe0623d49865aa71b756.zip | |
mm: add more BUILD_BUG_ONs to gfp_migratetype()
gfp_migratetype() also expects GFP_RECLAIMABLE and
GFP_MOVABLE|GFP_RECLAIMABLE to be shiftable into MIGRATE_* enum values, so
add some more BUILD_BUG_ONs to reflect this assumption.
Link: https://linux-review.googlesource.com/id/Iae64e2182f75c3aca776a486b71a72571d66d83e
Link: https://lkml.kernel.org/r/20220726230241.3770532-1-pcc@google.com
Signed-off-by: Peter Collingbourne <pcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/gfp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index f314be58fa77..ea6cb9399152 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -18,6 +18,9 @@ static inline int gfp_migratetype(const gfp_t gfp_flags) VM_WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK); BUILD_BUG_ON((1UL << GFP_MOVABLE_SHIFT) != ___GFP_MOVABLE); BUILD_BUG_ON((___GFP_MOVABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_MOVABLE); + BUILD_BUG_ON((___GFP_RECLAIMABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_RECLAIMABLE); + BUILD_BUG_ON(((___GFP_MOVABLE | ___GFP_RECLAIMABLE) >> + GFP_MOVABLE_SHIFT) != MIGRATE_HIGHATOMIC); if (unlikely(page_group_by_mobility_disabled)) return MIGRATE_UNMOVABLE; |